Band-saw guard.



E. HARROLD & C. G. WILDERSON.

BAND SAW GUARD.

APPLIOATION FILED APR.17, 1911.

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E. HARROLD & G. G. WILDBRSON.

BAND SAW GUARD.

APPLICATION FILED APILI'I. 1911.

1,068,239. Patented July 22,1913.

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I (WON A (a mawm COLUMBIA PLANOGRAPH 130., WASHINGTON, D. c.

tlhlllEl) STATES QFFICE.

ELMER HARROIID AND CLINTON GEORGE WILDERSQN, 0F LEETONIA, OHIO,ASSIGNORS TO THE CRESCENT MACHINE COMPANY, OF LEETONIA, OHIO, ACORPORATION OF OHIO.

BAND-SAW GUARD.

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Specification of Letters Patent.

Application filed April 17, 1911.

Patented July 22, 1913.

Serial No. 621,724.

To all whom 1775mm] concern:

Be it known that we, Emmi: l-litnnonn and CLINTON Gnome Emerson, ofLeetonia, in the county of Columbiana and State of Ohio, have invented anew and useful Improvement in Band-Saw Guards, of which the following isa full, clear, and exact description, reference being bad to the accom'ianying drawings, tori'uing part of this specification, in which Figure1 is a front view of a band saw with one form of our improved guardattached. liig. 2 is a rear view of the upper portion of the saw. Fig. 3is a partial sec tion on the line llllll' of Fig. 2. Fig. 4 is asectional view on the line lV-IV of Fig. 8. Fig. 5 is a perspective viewof one of the supporting arms for the guard for the upper wheel; andFig. (3 is a view similar to Fig. 3, illustrating a modified form ofsupporting arms for the guard.

This invention relates to band saw guards and is designed to provide acheap, simple and etlicient device of this character to cover both theupper and lowe" band wheels, and so arranged that the band can beremoved and replaced without disconnecting the guards.

Another object of our invention is to provide supports for the guardcovering the upper band wheel which are arranged to suit the variousrequirements and which are so connected that the guard will be shiftedwhen the band wheel is shifted to take up the slack in the saw band.

The precise nature of our invention will be best understood by referenceto the accompanying drawings, which will now be described, it beingpremised, however, that various changes may be made in the details ofconstruction and general arrangement of the parts without departing fromthe spirit and scope of our invention as defined in the appended claims.

In the accompanying drawings the nu meral 2 designates the frame of themachine, which is provided with suitable journals for the band wheels 3.The journal for the upper band wheel is arranged to slide in a guide ton an upward extension 5 from the frame 2.

6 is the :uljusting screw for adjusting the band. whee 3 and taking upthe slack ot the saw band. The journal box for the upper band wheel 3 isprovided with an extension 7 having a T-shaped slot 8. The outer face ofthis extension 8 is concave and is arranged to receive a convex face onone end. of a bracket 9.

1.0 is a bolt passing through an opening in the end of the bracket 9,said oj )ening being located centrally with relation to the convexedportion of said bracket. The end of this belt is provided with a headwhich is seated in the T-slot 8, and 11 is a washer having a convexedface arranged to be seated. in a concavity at the opposite face to theconvexed portion on the end of the bracket, and 12 is a nut on the endof the bolt 10 arranged to clamp the members in their ad j ustedpositions. The other end of this bracket 9 is PI'OVlflCLl with a boss 13having an opening thereth rough for the reception of a rod let, and 15is a set screw for securing the rod in the boss. Extending outwardly ateach end of the rod 14iis an arm in pro- 'ided with a boss 16 throughwhich the rod let extends and also provided with set screws 17 forsecuring the arms to the rod. The outer ends of these arms 16 arejn'ovided with arcuate extensions 18.

l!) is the band wheel guard which is preferably formed of a disk shapedmember, and is connected to an annular member 20 of angular crosssection. The guard is connected. to the extensions 18 by means of rivctspassing through openings in said extension, the disk and the one flangeof the annular member 20. The guard for the lower band wheel is similarto that just described, but is seemed to brackets 21. which are in turnconnected to the frame of the machine.

In Fig. ti we have illustrated a slightly modified term of arms 10 forconnecting the guard tor the upper band wheel to the supporting rod 14:.lVhcn it is desired to remove a band from a machine having guards suchas are illustrated in Figs. 1 to 5, the band is first removed from thewheels, and then successively moved forwardly over the guards. in theconstruction shown in Fig. (3, the band is first removed from. thewheels so that the band is between the upper guard and the wheel; oneportion of the band is then turned at right angles and passed be tweenthe giiiard and the nut on the end. oi the shaft of the wheel The bandis then removed from between the guard and the wheel, after which it canreadily be slipped over the guard for the lower wheel.

By the use of a connection such as the ball and socket connectionbetween the extension 8 and the bracket 9, we are enabled to obtain auniversal adjustment of the bracket 9, and by means of the variousadjusting connections between the rod 14, the bracket '9 and the guardsupporting arms 16, the guard can be adjusted in proper relation withthe upper band wheel. As all of the various connections for the upperband wheel are supported on the adjustable j ournal for said wheel, theguard and all of its various connections will be simultaneously shift-edwith said band wheel when it is adjusted to take up the slack in theband.

The advantages of our invention result from the provision of a band sawguard which is adapted to be secured in front of either of the bandwhee-ls and protect the operator from being caught by the wheel or sawpassing around said wheels, and arranged to permit the band to beremoved without disconnecting the guards. Another advantage results fromthe provision of connections for the guard for the upper band wheelwhich are supported on the adjustable journal, and which are adapted tobe adjusted with relation to the wheel. By the use of a guard of thischaracter, the operator is not only protected from being caught by thespokes of the wheels and the saw passing around the wheels, but he isalso protected from being caught by the band, if said band should breakand become entangled in the spokes of the wheels. The guard itself maybe made of any suitable material and of any desired shape, and wesupporting device connected to the guard member extending-rearwardlybeyond the wheel through the closed loop of the saw band, and means forconnecting said supporting device to the frame; substantially asdescribed.

2. A device of the character described, comprising a main frame, shaftsjournaled in said frame, saw band wheels connected to the front ends ofsaid shafts, a continuous saw band mounted on said wheels, guard membersin front of said wheels, supporting devices for the guard membersconnected to the frame, said supporting devices extending through theclosed loop for-med by the saw band and between the wheels, saidsupports and guards being arranged to permit the saw band to be placedin position on the wheels and removed therefrom without (lis turbing theguards; substantially as described.

In testimony whereof, we have hereunto set our hands.

ELMER HARROL'D. CLINTON GEORGE WILDE'RSON.

Witnesses Jessi-E J. GALLAGHER, JOHN B. MORGAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). C.

